Question

determine a raiz ou zero de cada função
a) f(x)= 4x+12 b) f(x)= 5x-7

c) f(x) -4x+12

Answer 1

a)
f(x) = 4 x + 12
y = 4x + 12
0 = 4x + 12
4x + 12 = 0
4x = - 12
x = - 12/4
x = - 3

b)
f(x) = 5x - 7
y = 5x - 7
0 = 5x - 7
5x - 7 = 0
5x = 7
x = 7/5

c)
f(x) = - 4x + 12
y = - 4x + 12
0 = - 4x + 12
4x = 12
x = 12/4
x = 3